Hello,
I am evaluating Mapnik as an engine to draw maps in a standalone, multi platform, desktop application.

I need to draw maps of a relatively small portion of land (about 300x300 km), the user should be able to zoom in/out and pan with the mouse at a speed comparable to google earth but the application have to work even with no internet connection at all.

I wouldn't have to install a database for this job and I saw Mapnik can work even with OSM files directly. So I installed Mapnik and python binding on my Ubuntu and started with some simple testing.

First of all,the OSM file of the portion of land I am interested in (http://download.gfoss.it/osm/osm/regioni/toscana.osm.bz2) is large when uncompressed (> 500 MB).

Is there a way for Mapnik to work directly with compressed data?

Secondly, I tried the simple tutorial, here:
http://trac.mapnik.org/wiki/GettingStarted

I changed the map soruces from the Shapefile to my OSM file and the reendering of the whole region is quite slow (>10 seconds).

Is Mapnik the right tool for this job? And if yes, do you have any advice on mapping format/configurations I have to use in order to lower disk space requirements and increase performance?

--
 _|/ Francesco Sacchi - Develer S.r.l., R&D dept.
  |\ http://www.develer.com/ - http://www.bertos.org
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